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Volume 27 Issue 2

Mar.  2010

Article Contents
Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2010 >  27(2): 230-242

Direct Climatic Effect of Dust Aerosol in the NCAR Community Atmosphere Model Version 3 (CAM3)

  • 1.

    Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029, Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Graduate University of the Chinese Academy of Sciences, Beijing 100049,Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029, Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029,Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/s00376-009-8170-z

  • Direct climate responses to dust shortwave and longwave radiative forcing (RF) are studied using the NCAR Community Atmosphere Model Version 3 (CAM3). The simulated RF at the top of the atmosphere (TOA) is -0.45 W m-2 in the solar spectrum and +0.09 W m-2 in the thermal spectrum on a global average. The magnitude of surface RF is larger than the TOA forcing, with global mean shortwave forcing of -1.76 W m-2 and longwave forcing of +0.31 W m-2. As a result, dust aerosol causes the absorption of 1.1 W m-2 in the atmosphere. The RF of dust aerosol is predicted to lead to a surface cooling of 0.5 K over the Sahara Desert and Arabian Peninsula. In the meantime, the upper troposphere is predicted to become warmer because of the absorption by dust. These changes in temperature lead to a more stable atmosphere, which results in increases in surface humidity. The upward sensible and latent heat fluxes at the surface are reduced, largely balancing the surface energy loss caused by the backscattering and absorption of dust aerosol. Precipitation is predicted to decrease moderately on a global scale.
  • [1] WANG Hong, SHI Guangyu, LI Shuyan, LI Wei, WANG Biao, HUANG Yanbin, 2006: The Impacts of Optical Properties on Radiative Forcing Due to Dust Aerosol, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 431-441.  doi: 10.1007/s00376-006-0431-5
    [2] ZHANG Hua, WANG Zhili, GUO Pinwen, WANG Zaizhi, 2009: A Modeling Study of the Effects of Direct Radiative Forcing Due to Carbonaceous Aerosol on the Climate in East Asia, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 57-66.  doi: 10.1007/s00376-009-0057-5
    [3] Xiaoyan WU, Jinyuan XIN, Wenyu ZHANG, Chongshui GONG, Yining MA, Yongjing MA, Tianxue WEN, Zirui LIU, Shili TIAN, Yuesi WANG, Fangkun WU, 2020: Optical, Radiative and Chemical Characteristics of Aerosol in Changsha City, Central China, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 1310-1322.  doi: 10.1007/s00376-020-0076-9
    [4] Boru MAI, Xuejiao DENG, Zhanqing LI, Jianjun LIU, Xiang'ao XIA, Huizheng CHE, Xia LIU, Fei LI, Yu ZOU, Maureen CRIBB, 2018: Aerosol Optical Properties and Radiative Impacts in the Pearl River Delta Region of China during the Dry Season, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 195-208.  doi: 10.1007/s00376-017-7092-4
    [5] SUN Zhian, WANG Xiaoyun, ZENG Xianning, 2006: Radiative Forcing of SO2 and NOx: A Case Study in Beijing, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 317-322.  doi: 10.1007/s00376-006-0317-6
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    [7] ZHANG Hua, ZHANG Ruoyu, and SHI Guangyu, 2013: An updated estimation of radiative forcing due to CO2 and its effect on global surface temperature change, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1017-1024.  doi: 10.1007/s00376-012-2204-7
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    [11] LIU Yuzhi, SHI Guangyu, XIE Yongkun, 2013: Impact of Dust Aerosol on Glacial-Interglacial Climate, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1725-1731.  doi: 10.1007/s00376-013-2289-7
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    [14] Hu Rongming, Serge Planton, Michel Déque, Pascal Marquet, Alain Braun, 2001: Why Is the Climate Forcing of Sulfate Aerosols So Uncertain?, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 1103-1120.  doi: 10.1007/s00376-001-0026-0
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    • Manuscript History

    Manuscript received: 10 March 2010
    Manuscript revised: 10 March 2010
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Direct Climatic Effect of Dust Aerosol in the NCAR Community Atmosphere Model Version 3 (CAM3)

    • 1. Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029, Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Graduate University of the Chinese Academy of Sciences, Beijing 100049,Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029, Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029,Nansen-Zhu International Research Center (NZC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2010-03-10
    • Manuscript revised: 2010-03-10

    Abstract: Direct climate responses to dust shortwave and longwave radiative forcing (RF) are studied using the NCAR Community Atmosphere Model Version 3 (CAM3). The simulated RF at the top of the atmosphere (TOA) is -0.45 W m-2 in the solar spectrum and +0.09 W m-2 in the thermal spectrum on a global average. The magnitude of surface RF is larger than the TOA forcing, with global mean shortwave forcing of -1.76 W m-2 and longwave forcing of +0.31 W m-2. As a result, dust aerosol causes the absorption of 1.1 W m-2 in the atmosphere. The RF of dust aerosol is predicted to lead to a surface cooling of 0.5 K over the Sahara Desert and Arabian Peninsula. In the meantime, the upper troposphere is predicted to become warmer because of the absorption by dust. These changes in temperature lead to a more stable atmosphere, which results in increases in surface humidity. The upward sensible and latent heat fluxes at the surface are reduced, largely balancing the surface energy loss caused by the backscattering and absorption of dust aerosol. Precipitation is predicted to decrease moderately on a global scale.

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